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Mederek Side Effects

Generic name: yohimbine

Medically reviewed by Last updated on May 25, 2024.

Note: This document contains side effect information about yohimbine. Some dosage forms listed on this page may not apply to the brand name Mederek.

Applies to yohimbine: compounding powder, oral tablet.


Use caution when driving, operating machinery, or performing other hazardous activities. Yohimbine may cause dizziness. If you experience dizziness, avoid these activities.

Use caution when rising from a sitting or lying position. Yohimbine may be more likely to cause dizziness when changing positions.

If you experience any of the following serious side effects, stop taking yohimbine (the active ingredient contained in Mederek) and seek emergency medical attention:

Other, less serious side effects are more likely to occur. Continue to take yohimbine and talk to your doctor if you experience

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

For Healthcare Professionals

Applies to yohimbine: compounding powder, oral tablet.

Nervous system

Nervous system side effects have included excitation, increased motor activity, tremor, and dizziness.[Ref]


Cardiovascular side effects have included elevation in blood pressure and increase in heart rate.[Ref]


Gastrointestinal side effects have included nausea and vomiting, commonly reported after parenteral administration of yohimbine (the active ingredient contained in Mederek) [Ref]


Psychiatric side effects have included irritability and generalized anxiety.[Ref]


General side effects have included headache and increase in sweating.[Ref]


Dermatologic side effects have included skin flushing reported with oral administration.[Ref]


A severe case of Raynaud's phenomenon has been reported in a 65-year-old man diagnosed with CREST syndrome (calcinosis, Raynaud's phenomenon, esophageal dysfunction, sclerodactyly, and telangiectasia). Painful episodes which affected all toes and fingers and his penis lasted 10 to 15 minutes and were relieved with heat. Symptoms resolved slowly over time upon discontinuation of yohimbine (the active ingredient contained in Mederek) Upon rechallenge with yohimbine, the patient developed more severe Raynaud's phenomenon.[Ref]


1. (2001) "Product Information. Yocon (yohimbine)." Glenwood Inc

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.